Excavating shovel



20, 1939. w, ER 2,162,99%

sxczwnme SHOVEL Filed Jan. 10, 19:55 2 Sheets-Sheet 2 Patented June 20,1939 UNITED STATES EXOAVATING SHOVEL Walter Baker, Cedar Rapids, Iowa,assignor to Speeder Maohin ery Corporation, Cedar Rapids, Iowa, acorporation of Iowa Application January 10, 1935, Serial No. 1,143

3 Claims.

This invention relates to excavating shovels and has particular relationto means for mounting such a shovel on a tractor and means for drivingthe shovel from the tractor motor.

It is, of course, old in the art tomount an excavating shovel on amobile base such as a frame work or chassis having motor driven endlesstracks thereon, or on a barge or the like, but it is the usual practiceeither to employ separate prime mover power means for driving the shoveland for moving the chassis or to employ a special power take off fromthe chassis moving power means for driving the shovel. In the lattercase relatively long chassis frames were employed and the machines werein the nature of special units designed for the one purpose.

It is customary at the'present time for several tractor manufacturers tobuild a more or less standardized tractor having means whereby pumps andthe like may be driven from the trac-' tor motor. In tractors of thisdescription the transmission case of the tractor usually constitut-esalso the main frame or chassis with the drive axle and drive wheelsmounted on the case at the rear thereof and the driving motor crank casemounted at the front thereof. In order that pumps and the like may bedriven from the tractor motor, it is usually customary to provide ashaft in the transmission case which is driven by the motor and whichextends to a position near the rear wall of the transmission case. Anopening is provided in the rear wall of the transmission case and meansare provided on the wall for the attachment of pumps and the like. Thepumps or like mechanisms have means for engaging the drive shaft abovementioned.

I have observed the desirability of providing an excavating shovel unitwhich may be mounted on the ordinary tractor and driven by the powertake off means ordinarily supplied with such tractors.

It is the general object of my invention to provide means -for mountingan excavating shovel on the top of the transmission case of a tractor ofthe above character and to provide means in the excavating shovelmounting means whereby the power take off of the tractor may be readilyutilized with a minimum of shafting for driving the rotating parts ofthe excavating shovel.

Other and further features and objects of my invention will be moreapparent to those skilled in the art upon a consideration of theaccompanying drawings and following specification, wherein is disclosedan exemplary embodiment of the invention, with the understanding,however, that such changes may be made therein as fall within the scopeof the appended claims without departing from the spirit of theinvention. The device may be used or adapted for use for other purposes.

In said drawings:

Figure 1 is a view in perspective showing an excavating shovel mountedon a tractor in accordance with one embodiment of my invention.

Figure 2 is a view, partly in elevation and partly in section, showingmeans whereby the excavating shovel is mounted on the tractor andshowing also the drive gearing for driving the rotating parts of theexcavating shovel; and

Figure 3 is a diagrammatic view illustrating the drive gearing of thedevice shown in Figures 1 and 2.

While I have illustrated and described my invention in connection withan excavating shovel structure it is apparent that the invention isapplicable to many types of excavators, cranes and the like such as clamshell cranes, lifting cranes, drag line shovels and excavating shovelsand so on, and wherever I use the term excavating shovel all similarstructures are included.

Referring now to the drawings a tractor of the type for which myexcavating shovel and shovel mounting means is particularly well adaptedis indicated generally by the numeral l0. The tractor here shown hasaheavy, substantially rectangular or box-like transmission H in whichthe drive gearing, by which power from the motor is conveyed to thewheels, is mounted. The housing H is quite large and strong as it servesnot only as .a transmission case but also as a chassis on which themotor and wheel driving axles are mounted.

The housingnot only serves as a case for the forward and reverse drivegearings but also serves as a case for the steering mechanism of thetractor. Tractors of this character are generally steered byindependently driving the wheels on one side or the other. The housingserves also as a bearing for the drive axles and as a main frame towhich the box-like drive axle housings l2 are secured, one on each sideof the 'gear housing. Tractor sub-frames iii are secured in opposedrelation, one on each side of the tractor and to the axle housings l2.The axles drive wheels which in turn drive endless treads H inaccordance with the usual practice. The drive motor is mounted at thefront of the housing under the hood l6 and the drive motor crank case issecured to the front of the drive gear housing II also in accordancewith the tractor. An opening 22 is provided in the rear wall 23 of thetransmission case M in line with the axis of .the take-off shaft 2| andstuds 24 are provided in circular position about this opening.

In practicing my invention I provide a heavy cover plate 25 adapted tobe fitted over the rear portion of the upper face of the transmissioncase or housing I and a pair of roughly triangular side plates 21 boltedone to each side of the transmission housing. A pair of long angle irons28 are bolted or otherwise secured to the upper outer faces of the sideplates or frames 21 and to the lower face of the plate 28. The extremeouter ends of the side plates 21 are connected by means of a cross plate29 to thereby afiord a strong substantial frame upon which the turntableof an excavation shovel constructed according to my invention may bemounted. The frame is additionally braced by means of braces 30extending from the draw bar guide support brackets l5 to.

the plate 26. I

A heavy bull ring 3| is mounted on top the transmission case cover plate26 and this bull ring 3| is provided with a sloping circular face 3|awhich affords a track upon which the rollers 32 of the turntable 33 mayroll. The bull ring 3| likewise has a vertically extending flange 3|b onthe inner face thereof to afford means whereby a spur gear 35 of theturntable 33 may rotate the turntable about a vertical axis ashereinafter more particularly described. The turntable 33 is preferablycomprised of a substantially circular horizontal plate 33a braced on thelower face thereof by angle irons 33b and 330. A pair of A frames 34 aremounted on top the circular plate 330. and these A frames are comprisedof the 1 side members 34a connected at the top by plates 34b and 340.The A frames 34 thus form a support to which the pulleys 38 for the boomsupporting cable 31 may be attached.

A pair of trapezoidal shaped pedestals 4| are placed on the plate 33ainside of the A frames 34 and these pedestals serve as bases upon whichthe bearings 42, 43 and 44 on a number of cross shafts are mounted. Thepull back back drum 46 is rotatably mounted on a cross shaft 41 inbearings 42 and a hoisting drum 48 is rotatably mounted upon a crossshaft 49, which in turn is rotatably mounted on bearings 43. A bull ringcross shaft 5| is mounted for rotation in bearings 44, and a pair ofopposed friction clutches 52 and 53 are mounted upon the cross shaft 5|.A shovel drive cross shaft 54 is mounted within the pedestal 4| atsubstantially the central portion thereof.

A drum type. horizontally disposed transmission case 56, which may betermed the shovel drive transmission case, is mounted on the rear wall23 of the transmission case M by means of the stud bolts 24. An upwardlyextending cylindrical portion 51 of the drive transmission case 56 isfastened'at its lower end to the upper face of the drive transmissioncase and at its upper end to the lower face of the bull ring 3|. A heavycollar 58 extends axially in line with the cylindrical member 51 up fromthe upper face of the bull ring plate 3| and through the circular plate33.

This collar 38 is closed off at its upper end as indicated at 58 and anextremely heavy strong bushing 3i is secured to the under side of thecircular plate 33 and in this manner is rotatably mounted on the collar33. The plate 33 is arranged to permit the entire turntable to-rotateabout a vertical axis on the bearings 83 within the collar 59 and on therollers 32 which are mounted on brackets 32 on the under side of theplate 33.

, The horizontally extending bracket portion 880, of the shoveltransmission case 58, by which the case is suspended on the-rear wall ofthe transmission case H, affords a bearing in which a short drive shaft83 may be rotatably mounted. This drive shaft 88 is splined at one endas indicated at 81 and the take-off shaft 2| of the tractor is likewisesplined as indicated at 88 to afford key ways for a sleeve coupling 88.The sleeve coupling 89 may be slid back and forth on the shaft 88 bymeans of a yoke 1| which engages a suitable groove in the coupling 88and which is actuated by means of a shaft and lever system indicated at12. The pull shaft and lever system ends in a control lever 13 adjacentthe operator'sstation at "and thus the coupling may be disengaged whenit is desirable to disengage the drive gearing from the motor.

A bevel pinion I8 is keyed to the shaft 68 within the shoveltransmission case 58. A large bevel ring gear I! is in mesh with thebevel pinion 15 and this ring Bear is keyed to a stout vertical shaft 18which passes upwardly through the upper face of the shovel transmissioncase 58, through the sleeves 51 and 58, and into a bevel pinion 19 atthe upper. end of the shaft. The bevel pinion 191s meshed with anotherbevel gear 8| which is keyed to the cross shaft 54. It may be observed,at this point, that power from the power take off of the tractor hasbeen conveyed up through the shovel turntable. The cross shaft 54 drivesa pinion gear 82 which in turn is meshed with a large gear 83 which inturn is keyed to the cross shaft 41. A clutch mechanism 84 of usual.construction may be employed in accordance with the usual practice toselectively drive or release the pull back drum 48. The spur gear 83 inturn is meshed with a spur gear 85 which is keyed to cross shaft 49 uponwhich the hoisting drum 48 is mounted and a clutch 81 is employed inaccordance with the usual practice for disengaging and engaging thehoisting drum 48 to the shaft 49 and spur gear 86. The large spur gear85 in turn is meshed with a smaller spur gear 88 which is keyed to thecross shaft 5|. Bevel gears 89 and 9| are adapted to be selectivelyengaged by the friction drive clutches 52 or 53 and these 'bevel gearsroll on a bull ring bevel gear 92. The bevel gear 92 is keyed to avertical shaft-.93 on the lower end of which a spur gear 35 is mountedand the spur gear 35 is in mesh with the internal gear teeth 3|c of thebull ring 3|b to effect rotation of the table.

It is now apparent that through the agency of the gearing described thepower take-off of the tractor is employed .to furnish power to thegearing system to convey torque directly from the motor to the pull backand the hoisting drums .and to the table turning means. The gearing,

bevel gears 89, 9| and 92 and spur gears 34 and 3|, is of substantiallythe usual construction. Control of the various drums and drives forrotating the pull back drum, the hoisting drum, and the turntable driveis effected by means of aieaees control systems including the controllevers at, 96 and 91 in accordance with the usual practice.

It is apparent that I have provided an extremely compact strong simplemounting for mounting an excavating shovel on a tractor of conventionaldesign and that I have provided a simple, efiective, efficient andreliable drive means for driving the rotating parts of a shovel from thepower take-oif of a tractor.

I claim as my invention: 4

1. The combination with a Caterpillar type tractor characterized by theuse of a tractor transmission case secured to the rear of the motor andmounting of the drive wheels and rear axle on the tractor transmissioncase to thus form the main base structure of the tractor, and thetractor transmission having a power take-oi? extending longitudinally ofthe tractor; of a shovel transmission case secured directly to the rearwall of the tractor transmission case in line with the power take-01f, aturntable mounted above the shovel transmission case with the axis ofrotation thereof to the rear of the tractor transmission case, and powertransmitting means associated with the shovel transmission case fortransmitting power from the power take-ofi'of the tractor to theturntable.

2. The combination with a Caterpil1ar" type tractor characterized by theuse of a tractor transmission case which formsthe main base structure ofthe motor, rear wheels and rear axle and the tractor transmission havinga power take-oil extending longitudinally of the tractor; of a shoveltransmission case secured directly to the rear wall of the tractortransmission case,

a turntable mounted above the tractor transmission case and projectingrearwardly beyond the rear wall of the tractor transmission case wherebythe axis of rotation of the turntable is rearward of the rear wall ofthe tractor transmission case, and power transmitting means associatedwith the shovel transmission case for transmitting power from the powertake-off of the tractor to the turntable.

3. The combination with a Caterpillar type tractor characterized by theuse or a tractor transmission case which forms the main base structureof the motor and wheels, and the tractor transmission having a powertake-off extending longitudinally of the tractor; of a shoveltransmission case secured directly to the rear wall of the tractortransmission case, a turntable mounted above the shovel transmissioncase, a drive shaft extending rearwardly from the power take-ofi of thetractor transmission into the shovel transmission case, a vertical shaftextending from within the shovel transmission case into the turntable,and a bevel and ring gear assembly within the shovel transmission casefor transmitting power from the power take-off to the vertical driveshaft.

; WAL'IER BAKER.

